LED lamp with a heat sink

Abstract

An LED lamp includes a post (10), a heat sink (20) enclosing the post, an LED module (30) mounted on the post, a holder (40) secured on the LED module, and a lens (50) covering the holder. The heat sink is formed by a plurality of separated fins assembled together. Each fin comprises an outer portion (22) and an inner portion (24). An inner edge of the outer portion abuts interferingly against a periphery of the post, and a bottom of the inner portion contacts a top surface of the post. Heat generated by the LED module is conducted through the post to the plurality of fins, which dissipate the heat to the ambient air.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a light emitting diode (LED) lamp, and more particularly to an LED lamp incorporating a heat sink for increasing a heat dissipation thereof.[0003]2. Description of Related Art[0004]As an energy-efficient light, an LED lamp has a trend of substituting for the fluorescent lamp for an indoor lighting purpose; in order to increase the overall lighting brightness, a plurality of LEDs are often incorporated into a signal lamp, in which how to efficiently dissipate heat generated by the plurality of LEDs becomes a challenge.[0005]Conventionally, an LED lamp comprises a cylindrical enclosure and a plurality of LEDs mounted on the enclosure. The plurality of LEDs may be arranged in a plurality of lines along a height direction of the enclosure and around lateral sides of the enclosure, or just radially mounted on a top face of the enclosure. When the plurality of LEDs are activated to lighten, he...

AI Technical Summary

Benefits of technology

[0008]An LED lamp includes a post, a heat sink enclosing the post, an LED module mounted on the post, a holder secured on the LED module, and a lens covering the holder. The heat sink is formed by a plurality of fins, each comprising an outer portion and an inner portion. A lower part of the outer portion has an inner edge abutting interferingly against a circumferential periphery of the post, and the inner portion has a bottom engaging a top surface of the post. Heat generated by an LED of the LED module can be conducted through the post to the plurality of fins, which dissipate the heat to the ambient air sufficiently with its large heat dissipating area. Therefore, the LED lamp can be made having a small size meanwhile with a high dissipating efficiency.

Problems solved by technology

However, in order to achieve a compact design and facilitate a transportation and handling of the LED lamp, the LED lamp is made having a small size, whereby the enclosure also has a small size, which leads to a limited heat dissipating area of the enclosure.

The limited heat dissipating area makes the enclosure have a lower heat dissipating capability and may cause the LEDs to overheat, whereby the LEDs will operate unstably or even fail.

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